Measurement of the light scattering of single and two particles captured with a microfluidic trap

Huimin Wang; Kecheng Yang; Baoyu Gong; Dekun Liu; Jie Dai; Long Yu; Min Xia

doi:10.1117/12.2266708

10 February 2017 Measurement of the light scattering of single and two particles captured with a microfluidic trap

Huimin Wang, Kecheng Yang, Baoyu Gong, Dekun Liu, Jie Dai, Long Yu, Min Xia

Proceedings Volume 10250, International Conference on Optical and Photonics Engineering (icOPEN 2016); 102501H (2017) https://doi.org/10.1117/12.2266708
Event: Fourth International Conference on Optical and Photonics Engineering, 2016, Chengdu, China

Abstract

We have developed a novel light scattering measurement system based on a microfluidic trap to measure the elastic light scattering of micro-particles. The particles were captured from the sample suspension by a microfluidic chip with a hydrodynamic trapping, which were stably immobilized at the predetermined position by the pressure gradient and friction in the micro-channel. The trapped particles were illuminated by a He-Ne laser after refractive index matching, and a narrow-field photodetector designed by the spatial filter and a photomultiplier mounted on a homocentric rotating platform was used to detecting the scattering light. In this paper, we have improved this measurement system. By reducing the background scattering of microfluidic chip to improve the signal-noise ratio and using precise control, we measured the 23.75μm diameter polystyrene microsphere’s light scattering distribution, the results showed a good agreement on the trend with the curves of theoretical result. At the same time, using the microfluidic trap, we captured two particles (same size and different size) in a fixed orientation with touching components and obtained the light scattering distribution.

Citation Download Citation

Huimin Wang, Kecheng Yang, Baoyu Gong, Dekun Liu, Jie Dai, Long Yu, and Min Xia "Measurement of the light scattering of single and two particles captured with a microfluidic trap", Proc. SPIE 10250, International Conference on Optical and Photonics Engineering (icOPEN 2016), 102501H (10 February 2017); https://doi.org/10.1117/12.2266708

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Light scattering

Microfluidics

Optical testing

Particles

Refractive index

Scatter measurement

Scattering

Keywords/Phrases

Search In:

Publication Years